665112271 has 8 divisors (see below), whose sum is σ = 709710320. Its totient is φ = 621473472.

The previous prime is 665112263. The next prime is 665112277. The reversal of 665112271 is 172211566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665112271 - 2³ = 665112263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665112277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238380 + ... + 241153.

It is an arithmetic number, because the mean of its divisors is an integer number (88713790).

Almost surely, 2^665112271 is an apocalyptic number.

665112271 is a deficient number, since it is larger than the sum of its proper divisors (44598049).

665112271 is a wasteful number, since it uses less digits than its factorization.

665112271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479625.

The product of its digits is 5040, while the sum is 31.

The square root of 665112271 is about 25789.7706659055. The cubic root of 665112271 is about 872.9009915328.

The spelling of 665112271 in words is "six hundred sixty-five million, one hundred twelve thousand, two hundred seventy-one".